Catalyst for carbonylation of dimethyl ether, preparation method and application thereof
A technology of dimethyl ether and carbonylation, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, carbon monoxide or formate reaction preparation, etc., which can solve the problems of easy clogging of molecular sieves, unfavorable reaction activity of butene isomerization reaction, etc. question
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Embodiment 1
[0043] The preparation method of the catalyst of the dimethyl ether carbonylation of the present embodiment, such as figure 1 shown, including the following steps:
[0044] 1) Converting mordenite molecular sieves into hydrogen-type mordenite by ammonia exchange method, filling hydrogen-type mordenite in a fixed-bed reactor, and heating to 400° C. for 1 hour activation under nitrogen atmosphere;
[0045] 2) After activation, lower the temperature to 300° C. and feed propylene into the catalyst bed for catalytic reaction. When the conversion rate of propylene is lower than 5%, stop feeding the substrate, and use nitrogen to purge the catalyst bed to lower the temperature to obtain precursor A ;
[0046] 3) Precursor A was placed in a high-temperature furnace, and the temperature was raised to 900°C for 1 hour under nitrogen at a heating rate of 100°C / min to obtain precursor B;
[0047] 4) Mix the precursor B obtained in step 3) with the dispersant methanol, place it in a plan...
Embodiment 2
[0050] The preparation method of the catalyst of the dimethyl ether carbonylation of the present embodiment comprises the following steps:
[0051] 1) Converting mordenite molecular sieves into hydrogen-type mordenite by ammonia exchange method, filling hydrogen-type mordenite in a fluidized bed reactor, and heating to 400° C. for 1 hour activation under nitrogen atmosphere;
[0052]2) After activation, feed isobutene into the catalyst bed at 400°C for catalytic reaction. When the conversion rate of isobutene is lower than 5%, stop feeding the substrate, and use helium to blow the catalyst bed to lower the temperature to obtain precursor A ;
[0053] 3) Precursor A was placed in a high-temperature furnace, and the temperature was raised to 600°C for 4 hours under the protection of nitrogen at a heating rate of 100°C / min to obtain precursor B;
[0054] 4) Mix the precursor B obtained in step 3) with the dispersant methanol and water, place it in a planetary ball mill and mill ...
Embodiment 3
[0057] The preparation method of the catalyst of the dimethyl ether carbonylation of the present embodiment comprises the following steps:
[0058] 1) The mordenite molecular sieve is converted into hydrogen-type mordenite by ammonia exchange method, and the hydrogen-type mordenite is loaded in a moving bed reactor, and heated to 450° C. for 1 hour activation under nitrogen atmosphere;
[0059] 2) After activation, feed 1-pentene into the catalyst bed at 450°C for catalytic reaction. When the conversion rate of 1-pentene is lower than 5%, stop feeding the substrate, and use helium to sweep the catalyst bed Lower the temperature to obtain precursor A;
[0060] 3) Precursor A was placed in a high-temperature furnace, and the temperature was raised to 500°C for 8 hours at a heating rate of 100°C / min under nitrogen gas to obtain precursor B;
[0061] 4) Mix the precursor B obtained in step 3) with the dispersant methanol, place it in a planetary ball mill and mill it at a speed o...
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Abstract
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